gms | German Medical Science

78. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie e. V.

Deutsche Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie e. V.

16.05. - 20.05.2007, München

Estimation of Speech Perception with the CI from preoperative Data

Meeting Abstract

Suche in Medline nach

  • corresponding author Gert Joseph - Medizinische Hochschule Hannover, Hannover, Germany
  • Andreas Büchner - Medizinische Hochschule Hannover, Hannover, Germany
  • Rolf-Dieter Battmer - Medizinische Hochschule Hannover, Hannover, Germany
  • Thomas Lenarz - Medizinische Hochschule Hannover, Hannover, Germany

German Society of Oto-Rhino-Laryngology, Head and Neck Surgery. 78th Annual Meeting of the German Society of Oto-Rhino-Laryngology, Head and Neck Surgery. Munich, 16.-20.05.2007. Düsseldorf, Köln: German Medical Science; 2007. Doc07hno017

Die elektronische Version dieses Artikels ist vollständig und ist verfügbar unter: http://www.egms.de/de/meetings/hno2007/07hno017.shtml

Veröffentlicht: 8. August 2007

© 2007 Joseph et al.
Dieser Artikel ist ein Open Access-Artikel und steht unter den Creative Commons Lizenzbedingungen (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.de). Er darf vervielf&aauml;ltigt, verbreitet und &oauml;ffentlich zug&aauml;nglich gemacht werden, vorausgesetzt dass Autor und Quelle genannt werden.


Gliederung

Text

The computation of possible postoperative speech perception with the CI can be important for the rehabilitation plan, for the expectations of the patient and also for quality control. For the development of a classification function a collective was selected by the conditions: age>18 years, first language German, no additional handicaps, no bilateral CI and only implant types Nucleus24 or Advanced Bionics HighFocus. For 242 patients we found the complete set of preoperative data: duration of deafness in the ipsilateral and the kontralateral ear, promontorium test ipsilateral, audiogram of both sides, Freiburger monosyllables and numbers preoperative. This collective was divided into a learn set and a test set with the same distributions in durations of deafness and in postoperative speech tests.

For the development of a classification function the learn and the test set were divided into performance classes by the results of the speech tracking test one year after implantation. On the learn set different classification functions were generated. The performance of a function like this can be obtained by the results on the test set. These results are lower than the results on the learn set, but they are more similar to the expected results that would be obtained with completely new data.

Divided into two performance classes, 57,9% of all patients from the test set set were classified correctly and with three performance classes the result was 43,8%. The most important variable was the ipsilateral duration of deafness.

The classification accuracy obtained up to now is only 5-10% above chance level but this analysis shows that this way to generate a classification function is practicable.